Plug-valve.



E. NOESBN.

PLUG VALVE. l APPLIGATIN FILED un. 4, 190s.

910,01 3. Patented Jan 19, 1909,.

w'gze inve/fr da/7 i? fw@ maan/wen ffw@ `TOHN E. NOESEN, OF CHICAGO,ILLINOIS.

PLUG-VALVE Specification of Letters Patent.

Patented Jan. 19, 1909.

Application filed April 4, 1908. Serial No. 425,272.

.. the admission and emission of fluid into and from cylinders for themovement of the pistons therein, whereby the ordinary mechanismconnected therewith is operated for the purpose of opening and closingdoors in elevators, cars and other structures, and operating air brakes.A valve which can be used in connection-with suitable cylinders wheneverit is desirable to reverse the flow of fluid or liquid through the valveautomatically and to so check the reverse flow as to form a cushion andthereby prevent concussion of operating parts.

The manner in which I accomplish my object is described in the followingspecification and illustrated in the accompanying drawings in which:

Figure l is a top plan of the valve with its connections. Fig. 2, is aside elevation; Fig. 3 is a horizontal central section on the line 3 3Fig. 2; Fig. 4 is the same section as Fig. 3, except the plug is changedto reverse the flow of fluid through the valve from the direction shownin Fig. 3; Fig. 5 is the same section as in Figs. 3 and 4t, showing achange in position of the plug, adapted to check the exhaust.

In the drawings, A indicates the body of the valve which is providedwith wings B, by which the valve may be secured to a wall or other partof a structure to which the valve is required to be attached. Throughthis body is a taper barrel C indicated by the dotted lines in Fig. 2.

Extending into the body A at right angles to the axis of the barrel Care four threaded apertures D, and extending from each of theseapertures into the barrel C are fluidways E. In each of the apertures Dare pipe extensions F, F1, F2 and F3. In the barrel C is a taper plugGr, secured by a nut I-I, and Washer I in the ordinary Way. This plug isprovided with a stop pin J, adapted to engage the stops K on the body A.On the head of the plug is a lever L and rod connection M, as shown inFigs. l and 2. The lever L is secured in the desired position on theplug by the set screw N. In the face of the plug Gr are two horizontalgrooves C and P. These grooves are adapted to register with the fluidways E when the plug is rotated. At each end of the groove P is ashallow recess Q forming an extension of that groove,the purpose ofwhich is hereinafter explained.

When the valve is constructed as described and illustrated, andisconnected by the pipes F1 and F2 to the front and back ends of acylinder containing a slidable piston, the piston rod thereof extendingthrough the cylinder head, the operation is as follows: `When the leverL is in the position shown in Fig. 1, the plug and grooves therein arein the position shown in section in Fig. 3. In that position the grooveO registers with the ways E extending through the body A from the feedpipe F and the front intake pipe F1, and the groove P registers with theways E from the back intake pipe F2 and exhaust pipe F3, therebypermitting the free passage of fluid from the feed pipe through thevalve and pipe F1 into the front end of a cylinder connected with thepipe F1 and the fluid in the back end of the cylinder to escape throughthe pipe F2, groove P and exhaust pipe F3 as the piston is moved in thecylinder by the pressure of the fluid from the feed pipe F. Uien thelever L is moved from the position indicated by the solid lines in Fig.l to the position shown by the dotted lines indicated by the referenceletter It, the plug is then in the position shown in Fig. 4. The grooveO then registers with the ways E extending through the body A from thefeed pipe F and from the back intake pipe F2; and the groove P registerswith the ways E from the front intake pipe F1, and to the exhaust F3,thereby permitting the fluid to pass from the feed pipe through the backintake pipe F2 into t e back end of the cylinder, and the fluid toescape from the front end of the cylinder through the exhaust as thepiston is moved by the pressureof fluid from the feed pipe, thusreversing the flow of fluid through the valve and thereby reversing themovement of the piston.

To produce a cushion in the cylinder by checking the exhaust, the leverL is moved to the left from the dotted position R to the dotted positionS, thereby changing the position of the plug from that shown in Fig. Llto that shown in Fig. 5; this movement and F3 can be connected with asource of brings the recess Q, at one end of the groove P over the wayE, thereby reducing the passage way for the exhaust from the full limitshown in Fig. 4 to the small space shown in Fig. 5. This reduction ofthe fluid way is produced as quickly or slowly as the lever and plug ismoved; and is adapted to so check the escape of fluid from the cylinderas to form the cushion as desired in the cylinder. The same limitedmovement of the lever to the right from the position shown by the solidlines in Fig. l, brings the recess Q in the opposite end of the groove Pover the way E from the pipe F 2, providing the cushion in exactly thesame way as before explained in the opposite end of the cylinder.

It is obvious that the pipes F, F1, F 2

supply of uid, cylinder or cylinders, and exhaust at any desired point,and that with the rod M or other means of connection with the lever L,the valve can be operated by hand or automatically by suitable means.

`What I claim and desire to secure byrLetters Patent is:

A valve consisting of a main body having a barrel therethrough and fourpassageways extending from said barrel through said body, a plugsupported in said barrel and ladapted to be partly rotated therein, saidplug being grooved on opposite sides, said grooves being adapted toregister alternatively with the passageways in said body, and having twoshallow recesses one at each end of one of said grooves forming exten-vsions thereof saidrecesses being adapted to register alternatively withthe two passageways in said body adapted to admit and emit fluid to andfrom cylinders connected therewith, whereby the exhaust from saidcylinders through said body is alternatively regulated as described.

JOHN E. NOESEN. Vitnesses THOMAS J. MORGAN, JOSEPH STAAB.

